Patent US3818839A successfully refreshed from Google Patents.
US3818839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parallel wheel drive
Assignee: Rexnord Inc
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Filing: 1972-11-24
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Granted: 1974-06-25
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Expires: 1992-11-24
Abstract
Abstract Devices for driving the propulsion wheels of a unit carrier system in which a plurality of cars are driven over a trackway by means of the frictional interaction of reaction surfaces on the cars with propulsion wheels mounted in the trackway. The devices consists of drive motors connected to a plurality of propulsion wheels by means of belts, chains, etc.
Inventors
- 👤 L Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:45
CPC Classifications
B; B61; B61B; B61B13/00; B61B13/12; B61B13/127
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
86 words
In a friction-powered unit carrier system having a plurality of cars which travel along trackways and are powered by the interaction of reaction surfaces on the cars with propulsion wheels mounted in the trackways, a device for transmitting power to said propulsion wheels comprising: 1. a drive motor mounted in a trackway; 2. a plurality of propulsion wheels; 3. linear drive means operatively connecting said drive motor to said propulsion wheels; and 4. a tension bracket assembly for changing the direction of said linear drive means.
Claim 2
Dependent Claim
86 words
In a friction-powered unit carrier system having a plurality of cars which travel along trackways and are powered by the interaction of reaction surfaces on the cars with propulsion wheels mounted in the trackways, a device for transmitting power to said propulsion wheels comprising: 1. a drive motor mounted in a trackway; 2. a plurality of propulsion wheels; 3. linear drive means operatively connecting said drive motor to said propulsion wheels; and 4. a tension bracket assembly for changing the direction of said linear drive means.
Claim 3
Dependent Claim
5 words
a plurality of propulsion wheels;
Claim 4
Dependent Claim
5 words
a plurality of propulsion wheels;
Claim 5
Dependent Claim
33 words
A friction-powered unit carrier system as claimed in claim 1 wherein said linear drive means are v-belts connecting sheaves rotably mounted on said motor and coaxially and integrally mounted with said propulsion wheels.
Claim 6
Dependent Claim
13 words
linear drive means operatively connecting said drive motor to said propulsion wheels; and
Claim 7
Dependent Claim
13 words
linear drive means operatively connecting said drive motor to said propulsion wheels; and
Claim 8
Dependent Claim
13 words
a tension bracket assembly for changing the direction of said linear drive means.
Claim 9
Dependent Claim
13 words
a tension bracket assembly for changing the direction of said linear drive means.
References Cited (Backward Citations)
US2905101A
Cited
US3643788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |